Epson Perfection 1200U User Manual - TWAIN - Page 94

Moiré crosshatch patterns appear in the scanned image.

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Moiré (crosshatch) patterns appear in the scanned image. Problem Solution You have scanned a document with halftone patterns. To minimize moiré patterns, try the following:  Place a transparent sheet between the document and the document table to slightly unfocus the image.  Move or angle the document slightly.  Adjust the Sharpness setting to a lower value to unfocus the image. See Customizing Destination Settings for more information.  Change the Target image size setting slightly.  Make sure De-screening is turned on in the Image Type dialog box. See Customizing Image Types for details. Character recognition is inaccurate after OCR scanning. Problem Solution You scanned the document using incorrect Image Type and Destination settings. Scan the document again using OCR as the Image Type and Destination settings in EPSON TWAIN. This automatically turns on the Text Enhancement Technology setting that eliminates background document noise. See Selecting Basic Settings for details. If character recognition is still too inaccurate, change the Image Type setting by selecting None for the B/W (Black & White) option setting. Then adjust the Threshold setting in the Image Controls dialog box; see Adjusting Image Controls for details. Try scanning again. Troubleshooting Page 94

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Troubleshooting
Page 94
Moiré (crosshatch) patterns appear in the scanned image.
Character recognition is inaccurate after OCR scanning.
Problem
Solution
You have scanned a
document with halftone
patterns.
To minimize moiré patterns, try the following:
Place a transparent sheet between the document and the document
table to slightly unfocus the image.
Move or angle the document slightly.
Adjust the Sharpness setting to a lower value to unfocus the image.
See
Customizing Destination Settings
for more information.
Change the Target image size setting slightly.
Make sure De-screening is turned on in the Image Type dialog box.
See
Customizing Image Types
for details.
Problem
Solution
You scanned the
document using
incorrect Image Type
and Destination
settings.
Scan the document again using
OCR
as the Image Type and
Destination settings in EPSON TWAIN. This automatically turns on the
Text Enhancement Technology setting that eliminates background
document noise. See
Selecting Basic Settings
for details.
If character recognition is still too inaccurate, change the Image Type
setting by selecting
None
for the B/W (Black & White) option setting.
Then adjust the Threshold setting in the Image Controls dialog box; see
Adjusting Image Controls
for details. Try scanning again.